Stadion: Court 1 Indoor Round: 44 Ground: Clay
| ITF - M15 - Sarajevo | 2021/05/31 08:00 | Bozo Barun v Ivan Randjelovic | 6-0,6-2 |
| ITF - M25 - Kiseljak | 2021/05/27 09:00 | Bozo Barun v Aldin Setkic | 2-6,4-6 |
| ITF - M25 - Kiseljak | 2021/05/26 09:00 | Stefan Micov v Bozo Barun | 4-6,1-6 |
| ITF - M25 - Kiseljak | 2021/05/25 08:00 | Bozo Barun v Goran Zivotic | 6-0,6-0 |
| ITF - M25 - Kiseljak | 2021/05/24 11:00 | Bozo Barun v Drazen Petrovic | 6-1,6-3 |
| ITF - M25 - Kiseljak | 2021/05/23 10:45 | Bozo Barun v Samuel M Arjona | 6-3,6-2 |
| ITF - M15 - Sibenik | 2021/05/19 15:05 | Bozo Barun v Naoki Tajima | 6-7,1-6 |
| ITF - M15 - Prijedor | 2021/05/14 10:15 | Matheus P De Almeida v Bozo Barun | 6-1,6-1 |
| ITF - M15 - Sarajevo | 2021/05/31 10:00 | Andrej Nedic v Nicolas Zanellato | 3-6,3-6 |
| ITF - M25 - Kiseljak | 2021/05/25 10:20 | Nicolas Zanellato v Lilian Breut | 6-4,3-6,8-10 |
| ITF - M25 - Kiseljak | 2021/05/24 12:15 | Viktor Jovic v Nicolas Zanellato | 6-2,3-6,8-10 |
| ITF - M15 - Brcko | 2021/05/21 15:20 | Matheus P De Almeida v Nicolas Zanellato | 6-4,7-6 |
| ITF - M15 - Brcko | 2021/05/21 12:15 | Nicolas Zanellato v Mateja Janicijevic | 6-0,6-0 |
| ITF - M15 - Brcko | 2021/05/18 14:20 | Viktor Jovic v Nicolas Zanellato | 4-6,0-6 |
| ITF - M15 - Brcko | 2021/05/18 08:15 | Nicolas Zanellato v Lilian Breut | 6-4,6-4 |
| ITF - M15 - Brcko | 2021/05/16 09:30 | Milos Milakovic v Nicolas Zanellato | 0-6,0-6 |